import axios from 'axios'
import { Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 50000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent

    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['satoken'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 200) {
      Message({
        message: res.message || 'Error',
        type: 'error',
        duration: 5 * 1000
      })

      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.message || 'Error'))
    } else {
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    // 获取错误响应
    const response = error.response
    if (response) {
      // 服务器返回了响应（状态码非2xx）
      const { status, data } = response
      
      // 根据HTTP状态码处理不同错误
      switch (status) {
        case 400:
          Message({
            message: data.message || '错误请求',
            type: 'error',
            duration: 5 * 1000
          })
          break
        case 401:
          Message({
            message: data.message || '未登录或登录过期',
            type: 'error',
            duration: 5 * 1000
          })
          
          // 跳转到登录页
          MessageBox.confirm('你已被登出，可以取消继续留在该页面，或者重新登录', '确定登出', {
            confirmButtonText: '重新登录',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {
            store.dispatch('user/resetToken').then(() => {
              location.reload()
            })
          })
          break
        case 403:
          Message({
            message: data.message || '权限不足，无法访问',
            type: 'info',
            duration: 5 * 1000
          })
          break
        case 404:
          Message({
            message: '请求资源不存在',
            type: 'info',
            duration: 5 * 1000
          })
          break
        case 500:
          Message({
            message: data.message || '服务器内部错误',
            type: 'error',
            duration: 5 * 1000
          })
          break
        default:
          Message({
            message: `请求错误，状态码: ${status}`,
            type: 'error',
            duration: 5 * 1000
          })
      }
    } else {
      // 网络错误或请求被取消
      Message({
        message: error.message || '网络连接失败，请稍后重试',
        type: 'error',
        duration: 5 * 1000
      })
    }
    // Message({
    //   message: error.message,
    //   type: 'error',
    //   duration: 5 * 1000
    // })
    return Promise.reject(error)
  }
)

export default service
